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bdk: display: improve and deduplicate more

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- Add delay after a DSI soft reset
- Remove more duplicated configs
- Improve code to save code size
- Improve comments
- Do not allow display_backlight to be used with OLED
This commit is contained in:
CTCaer
2025-12-25 11:36:06 +02:00
parent 67140d026c
commit a7ad3d4984
3 changed files with 67 additions and 73 deletions
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82
bdk/display/di.c
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@@ -67,6 +67,15 @@ static void _display_dsi_wait(u32 timeout, u32 off, u32 mask)
usleep(5);
}
static void _display_dsi_soft_reset()
{
// Disable DSI interface.
DSI(DSI_POWER_CONTROL) = 0;
// Settle time.
usleep(10);
}
static void _display_dsi_send_cmd(u8 cmd, u32 param, u32 wait)
{
DSI(DSI_WR_DATA) = (param << 8) | cmd;
@@ -374,50 +383,48 @@ void display_init()
PMC(APBDEV_PMC_IO_DPD_REQ) = PMC_IO_DPD_REQ_DPD_OFF;
PMC(APBDEV_PMC_IO_DPD2_REQ) = PMC_IO_DPD_REQ_DPD_OFF;
// Configure LCD/BL pins.
// Configure LCD/WLED driver pins.
if (!_nx_aula)
{
// Configure LCD pins.
// Configure LCD driver pins.
PINMUX_AUX(PINMUX_AUX_NFC_EN) = PINMUX_PULL_DOWN;
PINMUX_AUX(PINMUX_AUX_NFC_INT) = PINMUX_PULL_DOWN;
// Configure Backlight pins.
// Configure WLED driver pins.
PINMUX_AUX(PINMUX_AUX_LCD_BL_PWM) = PINMUX_PULL_DOWN;
PINMUX_AUX(PINMUX_AUX_LCD_BL_EN) = PINMUX_PULL_DOWN;
// Enable LCD AVDD.
// Enable LCD driver AVDD channels (+5.4V CH2 EN, -5.4V CH1 EN).
gpio_direction_output(GPIO_PORT_I, GPIO_PIN_0 | GPIO_PIN_1, GPIO_HIGH);
usleep(10000); // Wait minimum 4.2ms to stabilize.
// Configure Backlight PWM/EN pins (BL PWM, BL EN).
// Configure WLED driver PWM/EN pins.
gpio_direction_output(GPIO_PORT_V, GPIO_PIN_0 | GPIO_PIN_1, GPIO_LOW);
// Enable Backlight power.
// Enable WLED driver.
gpio_write(GPIO_PORT_V, GPIO_PIN_1, GPIO_HIGH);
}
// Configure LCD RST pin.
// Configure Panel Reset pin.
PINMUX_AUX(PINMUX_AUX_LCD_RST) = PINMUX_PULL_DOWN;
gpio_direction_output(GPIO_PORT_V, GPIO_PIN_2, GPIO_LOW);
// Power up supply regulator for display interface.
MIPI_CAL(MIPI_CAL_MIPI_BIAS_PAD_CFG2) = 0;
MIPI_CAL(MIPI_CAL_MIPI_BIAS_PAD_CFG0) = 0;
if (!tegra_t210)
{
MIPI_CAL(MIPI_CAL_MIPI_BIAS_PAD_CFG0) = 0;
APB_MISC(APB_MISC_GP_DSI_PAD_CONTROL) = 0;
}
// Set DISP1 clock source, parent clock and DSI/PCLK to command mode.
// T210: DIVM: 1, DIVN: 20, DIVP: 3. PLLD_OUT: 100.0 MHz, PLLD_OUT0 (DSI-BCLK): 50.0 MHz. (PCLK: 16.66 MHz)
// T210B01: DIVM: 1, DIVN: 20, DIVP: 3. PLLD_OUT: 97.8 MHz, PLLD_OUT0 (DSI-BCLK): 48.9 MHz. (PCLK: 16.30 MHz)
clock_enable_plld(3, 20, true, tegra_t210);
// Setup Display Interface initial window configuration.
reg_write_array((vu32 *)DISPLAY_A_BASE, _di_dc_setup_win_config, ARRAY_SIZE(_di_dc_setup_win_config));
// Setup Display Interface initial configuration.
reg_write_array((vu32 *)DISPLAY_A_BASE, _di_dc_init_config, ARRAY_SIZE(_di_dc_init_config));
// Setup dsi init sequence packets.
// Setup DSI init sequence packets.
reg_write_array((vu32 *)DSI_BASE, _di_dsi_seq_pkt_reset_config0, ARRAY_SIZE(_di_dsi_seq_pkt_reset_config0));
DSI(tegra_t210 ? DSI_INIT_SEQ_DATA_15 : DSI_INIT_SEQ_DATA_15_B01) = 0;
reg_write_array((vu32 *)DSI_BASE, _di_dsi_seq_pkt_reset_config1, ARRAY_SIZE(_di_dsi_seq_pkt_reset_config1));
@@ -428,9 +435,16 @@ void display_init()
// Setup init seq packet lengths, timings and power on DSI.
reg_write_array((vu32 *)DSI_BASE, _di_dsi_init_config, ARRAY_SIZE(_di_dsi_init_config));
usleep(10);
// DSI soft reset.
_display_dsi_soft_reset();
// Set DSI LP timings.
reg_write_array((vu32 *)DSI_BASE, _di_dsi_timing_lp_config, ARRAY_SIZE(_di_dsi_timing_lp_config));
usleep(10000);
// Enable LCD Reset.
// Enable Panel Reset.
gpio_write(GPIO_PORT_V, GPIO_PIN_2, GPIO_HIGH);
usleep(60000);
@@ -444,7 +458,7 @@ void display_init()
if (!display_dsi_read(MIPI_DCS_GET_DISPLAY_ID, 3, &_panel_id_raw))
break;
usleep(10000);
usleep(5000);
}
// Decode Display ID.
@@ -454,7 +468,7 @@ void display_init()
_panel_id = PANEL_JDI_XXX062M;
// For Aula ensure that we have a compatible panel id.
if (_nx_aula && _panel_id == 0xCCCC)
if (_nx_aula)
_panel_id = PANEL_SAM_AMS699VC01;
// Initialize display panel.
@@ -537,7 +551,7 @@ void display_init()
reg_write_array((vu32 *)DSI_BASE, _di_dsi_seq_pkt_video_non_burst_no_eot_config, ARRAY_SIZE(_di_dsi_seq_pkt_video_non_burst_no_eot_config));
// Set 1-by-1 pixel/clock and pixel clock to 234 / 3 = 78 MHz. For 60 Hz refresh rate.
DISPLAY_A(DC_DISP_DISP_CLOCK_CONTROL) = PIXEL_CLK_DIVIDER_PCD1 | SHIFT_CLK_DIVIDER(4); // 4: div3.
DISPLAY_A(DC_DISP_DISP_CLOCK_CONTROL) = PIXEL_CLK_DIVIDER_PCD1 | SHIFT_CLK_DIVIDER(4); // div3. Default: div4.
// Set DSI mode to HOST.
reg_write_array((vu32 *)DSI_BASE, _di_dsi_host_mode_config, ARRAY_SIZE(_di_dsi_host_mode_config));
@@ -577,8 +591,8 @@ void display_init()
}
usleep(10000);
// Enable video display controller.
reg_write_array((vu32 *)DISPLAY_A_BASE, _di_dc_video_enable_config, ARRAY_SIZE(_di_dc_video_enable_config));
// Setup video mode.
reg_write_array((vu32 *)DISPLAY_A_BASE, _di_dc_video_mode_config, ARRAY_SIZE(_di_dc_video_mode_config));
}
void display_backlight_pwm_init()
@@ -600,6 +614,9 @@ void display_backlight_pwm_init()
void display_backlight(bool enable)
{
if (_panel_id == PANEL_SAM_AMS699VC01)
return;
// Backlight PWM GPIO.
gpio_write(GPIO_PORT_V, GPIO_PIN_0, enable ? GPIO_HIGH : GPIO_LOW);
}
@@ -630,7 +647,7 @@ static void _display_pwm_backlight_brightness(u32 duty, u32 step_delay)
if (old_value < duty)
{
for (u32 i = old_value; i < duty + 1; i++)
for (u32 i = old_value; i <= duty; i++)
{
PWM(PWM_CONTROLLER_PWM_CSR_0) = PWM_CSR_EN | (i << 16);
usleep(step_delay);
@@ -638,14 +655,12 @@ static void _display_pwm_backlight_brightness(u32 duty, u32 step_delay)
}
else
{
for (u32 i = old_value; i > duty; i--)
for (int i = old_value; i >= (int)duty; i--)
{
PWM(PWM_CONTROLLER_PWM_CSR_0) = PWM_CSR_EN | (i << 16);
usleep(step_delay);
}
}
if (!duty)
PWM(PWM_CONTROLLER_PWM_CSR_0) = 0;
}
void display_backlight_brightness(u32 brightness, u32 step_delay)
@@ -688,8 +703,11 @@ static void _display_panel_and_hw_end(bool no_panel_deinit)
// T210B01: DIVM: 1, DIVN: 20, DIVP: 3. PLLD_OUT: 97.8 MHz, PLLD_OUT0 (DSI-BCLK): 48.9 MHz. (PCLK: 16.30 MHz)
clock_enable_plld(3, 20, true, hw_get_chip_id() == GP_HIDREV_MAJOR_T210);
// Set timings for lowpower clocks.
reg_write_array((vu32 *)DSI_BASE, _di_dsi_timing_deinit_config, ARRAY_SIZE(_di_dsi_timing_deinit_config));
// DSI soft reset.
_display_dsi_soft_reset();
// Set DSI LP timings.
reg_write_array((vu32 *)DSI_BASE, _di_dsi_timing_lp_config, ARRAY_SIZE(_di_dsi_timing_lp_config));
if (_panel_id != PANEL_SAM_AMS699VC01)
usleep(10000);
@@ -750,16 +768,16 @@ static void _display_panel_and_hw_end(bool no_panel_deinit)
(_panel_id == PANEL_SAM_AMS699VC01) ? 120000 : 50000);
skip_panel_deinit:
// Disable LCD power pins.
gpio_write(GPIO_PORT_V, GPIO_PIN_2, GPIO_LOW); // LCD Reset disable.
// Disable Panel Reset.
gpio_write(GPIO_PORT_V, GPIO_PIN_2, GPIO_LOW);
usleep(10000);
if (!_nx_aula) // HOS uses panel id.
{
gpio_write(GPIO_PORT_I, GPIO_PIN_1, GPIO_LOW); // LCD AVDD -5.4V disable.
gpio_write(GPIO_PORT_I, GPIO_PIN_0, GPIO_LOW); // LCD AVDD +5.4V disable.
// Disable LCD driver AVDD channels.
gpio_write(GPIO_PORT_I, GPIO_PIN_0 | GPIO_PIN_1, GPIO_LOW);
// Make sure LCD PWM backlight pin is in PWM0 mode.
// Make sure LCD driver PWM pin is in PWM0 mode.
gpio_config(GPIO_PORT_V, GPIO_PIN_0, GPIO_MODE_SPIO); // Backlight PWM.
PINMUX_AUX(PINMUX_AUX_LCD_BL_PWM) = PINMUX_TRISTATE | PINMUX_PULL_DOWN | 1; // Set PWM0 mode.
}
@@ -771,10 +789,10 @@ skip_panel_deinit:
CLOCK(CLK_RST_CONTROLLER_RST_DEV_L_SET) = BIT(CLK_L_DISP1);
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_L_CLR) = BIT(CLK_L_DISP1);
// Power down pads.
// Power down.
DSI(DSI_PAD_CONTROL_0) = DSI_PAD_CONTROL_VS1_PULLDN_CLK | DSI_PAD_CONTROL_VS1_PULLDN(0xF) |
DSI_PAD_CONTROL_VS1_PDIO_CLK | DSI_PAD_CONTROL_VS1_PDIO(0xF);
DSI(DSI_POWER_CONTROL) = 0;
_display_dsi_soft_reset();
// Disable DSI AVDD.
max7762x_regulator_enable(REGULATOR_LDO0, false);